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Simulations show magnetic field can change 10 times faster than previously thought

A new study by the University of Leeds and the University of California at San Diego reveals that changes in the direction of the Earth's magnetic field may take place 10 times faster than previously thought. Their study gives new insight into the swirling flow of iron 2800 kilometers below the planet's surface and how it has influenced the movement of the magnetic field during the past hundred thousand years. Our magnetic field is generated and maintained by a convective flow of molten metal that forms the Earth's outer core. The motion of the liquid iron creates the electric currents that power the field, which not only helps guide navigational systems but also helps shield us from harmful extraterrestrial radiation and hold our atmosphere in the place. Read more...

 

 

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